THE GENEBAL CLAUSES IN  SPECIFICATIONS.       117
The following clause refers especially to the construction of a steel viaduct:*
Contractors are also required to check all leading dimensions and clearances as a whole and in detail, the fitting of all details, and to become responsible for the exact position and elevation of all parts of the work, which will only primarily be located by the engineer of the department of public parks. They will maintain their own field engineering, that of the city being for the purposes of original lay-out, inspection, and checking. The contractor must provide and maintain such facilities for the engineer or his assistants as he may require for the convenient examination and inspection of the work in progress. He will pay the cost of testing all material in laboratories or shops, and the cost of such mill and shop inspection as he may be called upon to perform in addition to that furnished by the engineer, the selection of such laboratory or inspectors being dictated by the engineer, to whom they will report. He will furnish such monthly progress photographs as may be required to maintain the record.              A. P. B.
108. The Contract Subject to Interpretation and Change by the Engineer in the Following Particulars: t
(a)    Where meaning" is obscure and uncertain.
(£) As to what is implied beyond that which is specifically described.
(c) In case of discrepancies between plans and specifications.
(</) In ca«e changes of plans or methods of work are afterwards decided upon.
Since the engineer is the author of the specifications, he evidently is the proper party to interpret their meaning. It goes without saying that the specifications and plans should be an clear and definite as possible in nil particulars, but it is quite impossible to free language from many inherent defects, neither is it practicable to describe minutely and in detail all
•In thUcftse both foundation!! and •upcratructure formed one contract. If tJ*« owner should prepare the foundations! lie must guarantee his surveys and locations t* be ms shown on the drawings, or as described In the specifications. In this case pr«-viiion must also be made for a comparison of the standards of length used by tb«
©wser and by the contractor.
t Sec Arts, jjj, 33, 34, 38 and 39.